<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    .box{

    }
</style>
<body>
    <script>
        // 推荐方式一:log -> enter
        console.log("heel");
        // 推荐方式二: react 插件 -> clg
        console.log("first")
        //函数
        function sayHello (){
            
        }
    </script>
</body>
</html>